Stereoselective Hydrogenation of Phthalates Using Pt/TiO2 Catalyst
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Solution Overview
Problem
Current methods for the hydrogenation of phthalates lack stereoselectivity, resulting in inefficient conversion and product purity.
Innovation Solution
A process involving the use of a Pt/TiO2 catalyst for the stereoselective hydrogenation of phthalates, where phthalates are initially charged, Pt/TiO2 is added, hydrogen is fed in, and the reaction is conducted under specific temperature, pressure, and solvent conditions to achieve conversion to a compound of formula (II).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional hydrogenation methods are used, then the reaction can proceed, but stereoselectivity is poor resulting in low product purity
Solution Approach 1:
The patent changes the chemical parameters of the catalyst system by using Pt/TiO2 instead of conventional catalysts, and optimizes reaction parameters including temperature (20-120°C), pressure (0.5-10 MPa), and solvent selection to achieve high stereoselectivity and product purity
Solution Approach 2:
The patent employs a composite catalyst system consisting of Pt nanoparticles supported on TiO2, where the combination of metal catalyst and oxide support creates synergistic effects that enhance both stereoselectivity and reaction efficiency
2Productivity
If conventional catalysts are used, then hydrogenation can occur, but conversion efficiency is low
Solution Approach 1:
The patent optimizes reaction parameters including temperature range (20-120°C), hydrogen pressure (0.5-10 MPa), and catalyst loading (0.1-5 mol% Pt) to maximize conversion efficiency while maintaining high yield
Solution Approach 2:
The Pt/TiO2 composite catalyst provides enhanced activity compared to conventional catalysts, achieving conversion efficiencies exceeding 98% with corresponding high yields
3Manufacturing precision
If high stereoselectivity is achieved through optimized conditions, then product quality improves, but process complexity increases
Solution Approach 1:
The patent achieves optical purity of 99:1 by optimizing reaction parameters including temperature, pressure, and solvent selection, while maintaining a relatively simple one-pot hydrogenation process without complex additional steps
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The process achieves high yield (>98%) and optical purity (99:1) of the hydrogenated phthalate product, with the catalyst being recyclable and maintaining efficiency across multiple cycles.
Implementation Method 1
adding Pt/TiO2; reacting the reaction mixture from a) to c), with conversion of the phthalate to a compound of formula (II)
Implementation Method 2
stereoselective hydrogenation of phthalates; feeding in H2; conversion of the phthalate to a compound of formula (II)
Data Source
AI summary
The invention relates to a process for the stereoselective hydrogenation of phthalates, to a hydrogenation catalyst and to a hydrogenated phthalate.